[SM-PLUGINS] New version of message_source

[Marc G. K. <ma...@it...>]

Hello,

Finally I managed to solve some nasty bugs in the message source plugin.

Changes:
*)In the new release the entity index numbering is correct (at least with
my test messages)

*)Generating the message became a lot quicker.

*) Some minor layout changes

Please test the plugin.

Regards,

Marc Groot Koerkamp